Not too happy
The app does what it claims to do... for some music. If a tune has a consistent down beat, it keeps track pretty well. But it cannot keep up with anything that has a lot of off beats; it gets confused very easily.
If you plan to use this with rock, jazz, etc. it will probably work very well for you, but if you are doing something more advanced dont expect much.
Dudeydude77 about
liveBPM - Beat Detector, v1.2.0